Investments (Schedule of Investments Measured at Fair Value on a Recurring Basis) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Carrying Value	$ 48,982,622	$ 13,810,041
Interest Income Accrued	369,658	312,028
Interest Income Earned	710,556	352,959
Industrial
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Carrying Value	500,000	500,000
Interest Income Accrued	2,708
Interest Income Earned	8,215	15,889
Commercial mortgage loan - multi-family
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Carrying Value	46,423,549	11,320,924
Interest Income Accrued	348,699	116,860
Interest Income Earned	652,708	329,684
Other.
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Carrying Value	2,059,073	1,989,117
Interest Income Accrued	18,251	195,168
Interest Income Earned	49,633	7,386
Fair Value, Inputs, Level 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Carrying Value	$ 48,982,622	$ 13,810,041